free-content license by Open Content Project From Wikipedia, the free encyclopedia
The Open Publication License (OPL) is a public copyright license for documents, it was published by the Open Content Project in 1999 to replace the Open Content License, which was published in 1998.[1][2]
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.